Sorry, i should have explained myself better. In RoN, which uses an e-risk map for the 'Conquer the World', there are supply center's in various regions, and so when you capture a supply center, you can play a new Army anywhere in the territory you control, unless there is already an army present. You can also not attack with more than one army at a time, though other armies close to you can send reinforcement.
The supply center's i would be looking at for SWGB2 would be-
- Kamino
- Geonosis
- Corellia
- Kuat